Core-making and sand-molding machine.



F. PENLINGTON. 001m. MAKING AND SAND MOLDING MACHINE.

APPLICATION FILED NOV. 30, 1908.

Patented Jan. 18, 1910.

2 SHEETS-SHEET 1.

F. PENLINGTON.

CORE MAKING AND SAND MOLDING MACHINE. APPLICATION FILED NOV. 30, 1908.

946,645. Patented Jan. 18,1910.

- 2 SHEETS-SHEET 2.

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wmm 6 r JW% FRED PENLINGTON, 0F GORTON, MANCHESTER, ENGLAND.

CORE-MAKING AND SAND-MOLDING MACHINE.

Specification of Letters Patent.

Application filed November 30, 1908.

Patented Jan. 18, 1910.

Serial No. 465,011.

T 0 all whom it may concern:

Be it known that I, FRED PENLINGTON, a subject of the King of Great Britain and Ireland, and resident of Gorton, Manchester, in the county of Lancaster, England, foundry superintendent, have invented certain new and useful Improvements in or in Connection with Core-Making and Sand- Molding Machines, of which the following is a specification.

This invention relates to improvements in core making and molding machines employed in foundries, the principal objects of the invention being to provide simple and easily-operated mechanism whereby the cores can be easily made and vented and the patterns in the molding machine be readily withdrawn from the sand.

My invention consists essentially in a core making machine in the provision of a movable vent wire or rod or rods in combination with a longitudinally movable plunger or plungers each adapted to be longitudinally adjusted and operated in accordance with the work in hand, slotted levers embracing the rod and plunger and links connected with the levers for directly operating such arts, similar mechanism with slight modications being applied and essentially claimed in connection with the operation of one or a pair of tables in a sand-molding machine, the vent rod in the core making machine being essentially adapted to be longitudinally moved away from the core box during the ramming of the sand in the making of the core so that no obstruction is offered in the course of the operation.

My invention particularly relates to that class of core making machine in which dies or blocks are employed in which to ram the sand and to that class of molding machine in which a table or tables, is employed and adapted to rise and fall.

The invention will be fully described with reference to the accompanying drawings in Figure 1 indicates a front elevation of so much of a core making machine with my improvements applied thereto as is necessary to enable the invention to be understood, Fig. 2 plan of same, Fig. 3 similar elevation, partly in section to Fig. 1 showing the improvements applied to a molding machine and Fig. 4 sectional plan on line 1, 2 of Fig. 3. Fig. 5 partial sectional elevation ofa modified form of the core making machine and Fig. 6 partial inverted sectional plan of same on lines 1, 2 of Fig. 5.

In carrying out my invention with particular reference for the time being to Figs. 1 and 2 a indicates a frame of a core making machine of any suitable construction adapted to support a table 6 which, in turn, supports the ordinary dies, blocks, boxes or the like in which the sand to form the core is rammed. These dies may be of any ordinary construction. In the center of the table I) is a hole 0 through which passes a tubular plunger (Z by which the core is ejected from the die and in the interior of the plunger and combined therewith is a longitudinally-movable rod f for venting the core throughout its length or thickness prior to its discharge from the die.

The characteristic feature of my invention consists in a longitudinally-movable vent wire or wires in combination with one or a plurality of hollow plungers also longitudinally movable, slotted levers embracing the wire and plunger and links suspended from the frame of the machine to which the levers are pivoted. To this end the vent wire has secured to it toward its lower end a cross pin or bar 9 which is journaled in the sides of a lever it one end 2' of which is pivoted at j to the lower end of the link 76 suspended from a pin Z at the underside of the table 5, while the other end of the lever is formed into a handle m by which it may be operated. The center portion ofthe lever is slotted at n to freely embrace the plunger cl while the latter has a slot 0 to enable the pin 9 to work up and down. The plunger (Z is operated by a corresponding lever 79 to that already named which is pivoted to a link q also sus pended from the table 6. Lever p is coupled to plunger d in a similar manner to that in which'the lever h is coupled to the vent wire f that is to say by a pin 8. t is a collar secured to the plunger d and adapted to be adjusted thereon so that the latter may he set to any vertical position required either to be flush with the top of the table Z) or to project any distance into the interior of any particular die or block so that varying lengths of cores may be made in one block of a standard length. By his means any particular length of core can be made to the number required. a are pivoted catches carried by the frame or plate 6 on the machine and adapted to be pushed on one side as either of the operating levers is raised and then to slip under it automatically as to hold it in the raised position as long as may be required.

In a machine of the character described the core block or die is placed on the table 7) above or around the plunger (I. It is then rammed with sand to form the core while the plunger and vent wire remain in their lowest positions. hen the ramming is completed the lever attached to the vent wire is operated and the latter is pushed upward through the core so as to provide a vent hole throughout its length. The lever is then lowered, removing the vent and leaving core free from obstruction while the plunger is operated by the lever secured to it so that the core is ejected from the upper end of the block. The parts may then be returned to normal position. It will be seen that the mechanism allows of direct motion being given to the vent wire and plunger, consequently the operation is not only simple but quick. I employ similar mechanism with but slight modifications in the molding machine of which an example is shown in Figs. 3 and 4 in which in place of the vent wire I employ a central movable shaft or plunger a supporting a plate a while in place of the plunger (Z I use an outer plunger supporting a plate b preferably at right angles to plate a Corresponding links and levers bearing similar reference letters are employed for operating the two plungers. c are pillars supporting a rectangular frame 0 upon which the sand mold box is supported. The plates or tables a and b are raised more or less flush with the frame during the ramming of the sand in the box. The tables are held in the raised position by catches similar to those on the core making machine and which engage with the operating levers. The tables are intended to support different parts of the pattern during the ramming operation, the lower table being adapted to support a portion of the pattern which may be required to be withdrawn from the sand mold. first while the upper table supports that portion of the pattern requiring to be drawn last. The patterns need not be directly supported upon the tables as in ac- :cordance with the character of such patterns they may be supported on suitable mountings or brackets which, in turn, are carried by the tables. These mountings would be of such a character as to enable the lower table 6 to be lowered to withdraw the first portion of the pattern first and in order afterward to enable the uppermost table to descend to withdraw the second portion of the pattern as already stated. I would nevertheless have it un derstood that I may only employ one table such as a or b for supporting and withdrawing the pattern from the sand box as in cases in which the whole of the pattern may be withdrawn at one operation.

In the arrangement shown in Figs. 5 and 6, a plurality of plungers similar to- (Z are employed, these being fixed to a plate (Z which may be adjustably fixed on plunger (Z. These additional plungers are Operated simultaneously with the central plunger and both they and the latter may pass through holes in an additional table a fixed to table 6. They all admit of vertical adjustment so that cores of any length or thickness may be made. In conjunction with them additional vent wires f may be connected to and operated from the central vent wire 7 and be adjustable thereon. The additional plungers may be connected to an adjustable plate mounted on the central plunger below the table 6, if found more convenient, and pass through holes in the table 6. Table a supports the core boxes or blocks in a similar manner to Z). The modified arrangement enables several cores to be made simultaneously and is particularly serviceable for small cores.

It will be observed that in connection with both types of machines described the links for supporting the operating levers are arranged to swing to allow the latter to operate the wire and plungers easily.

lVhat I claim as my invention and desire to secure by Letters Patent is 1. In molding apparatus, the combination, with a frame provided with a guide, of a tubular plunger slidable in the said guide and provided with longitudinal slots, an operating lever pivotally connected with the said frame and plunger, a central plunger slidable in the said tubular plunger and provided with a pivot pin which projects crosswise through the said slots, and a second operating lever pivotally connected with the said frame and pivot pin.

2. In molding apparatus, the combination, with a frame provided with a guide, of a tubular plunger slidable in the said guide and provided with longitudinal slots, a collar secured on the said plunger at one end of the said slots, an operating lever pivotally connected with the said frame and collar, a central plunger slidable in the said tubular plunger and provided with a pivot pin which projects crosswise through the tion adjusted in accordance with the length said slots, and a second operating lever pivof core to be made substantially as described. 10 otally connected with the said frame and In testimony whereof I have hereunto set pivot pin. my hand in the presence of two witnesses. 3. In a core-making machine the combina- FRED PENLINGTON.

tion with the core-ejecting plunger of an Witnesses:

adjustable collar mounted thereon to enable WILLIAM HENRY TAYLOR,

said plunger to have its longitudinal posi- AMY E. EVINS. 

